Решите уравнение \(10sin^2x+5sinxcosx +cos^2x=3.\)
\(-\frac{\pi}{4}+\pi n, n \in Z\)
\(-\pi+\pi n, n \in Z\)
\(arctg\frac{2}{7}+\pi n, n \in Z\)
\(-arctg\frac{2}{7}+\pi n, n \in Z\)